Which Came First?

We had a pretty interesting conversation over breakfast this morning. As our thirteen year old was eating (no, devouring) his soft boiled egg... He looks at me and says "How does this become a chicken"?... This kid doesn't ask a whole lot of questions most of the time, but when he does it's usually something comical and a chuckle always follows.
So, I proceeded to explain.... this is a cooked egg.... they don't turn into chickens blah.. blah... blah, he really wasn't interested in the answer, he just thought it was funny asking the question, oh who understands what goes through these kids minds anyways....
Then our 15 year old asks..."So, Rob which did come first the chicken or the egg?" After a long hardy laugh Robert answers..
" the rooster".... Ya, the 13 year old... I was stunned and didn't know to laugh or be upset at the X-rated answer. The older brother advises his younger sibling that he shouldn't crack jokes about things he doesn't "get". Then they go into this whole dialog about who "gets" it and who doesn't.
All of a sudden, I'm feeling left out of the loop... like hello??? Mother sitting here....
What are these kids learning in school these day, from their friends no doubt. I found the whole thing so funny, that here we are... I guess they are grown up enough to "get" these kinda jokes, of course I didn't laugh, didn't know what to say really at the moment, so just said... " ok smarty pants, there will be no talking like that..." and was barely holding myself back from bursting into a serious laugh. Wow, I guess we always see our kids as the little innocent young ones, but boy do they grow up fast, before we know it they'll be teaching us a thing or two about life... chickens and eggs and what not.
But it was a good laugh, way to start the morning.

Love and Peace! (with chicks and eggs) :)